Improvement in pumps



H. A. JAMIESON.

, PUMP.

Patented J'une19,1877.

NPHERS. PNDTO-UTFOGRAPHER, WASHINGTON. D C.

PATENT: rFIcn.

HENRY A. JAMIESON, oF BRooKLYN, NEW YORK.

IMPROVEMENT IN PUMPS.

specification forming part of Letters Patent No. 592,072, dated June 19,1877; application filed December 8, 1876.

To all whom "it may concern:

Be it known that l,HENRY A. JAMIESON,

of the city of Brooklyinin the county of Kings and State of New York,have invented a new and useful Improvement in Pumps; and I do herebydeclare that the following is a full,

clear, and exact description of the same, refthe piston or plunger ofthe pump and its working-cylinder, whereby the cutting of the piston orplunger and its cylinder by the grit or impurities in the water isprevented, and consequently the efficiency and durability of the pump,as well as its relief from interior friction of the piston or plunger,are augmented.

Theinvention consists in a combination with the pump-cylinder, itspiston or plunger, and the inlet and outlet valves of the pump of one ormore cham hers arranged between said valves and the pump-cylinder, andin free communication with said cylinder,and a flexible diaphragmapplied to such chamber or chambers, whereby, on charging thepumpcylinder, and, in case of duplicate interposed chambers, one of saidchambers, with any suitable liquid, such as oil or water free fromgritty impurities, the motion of the piston or pluugeris transmittedthrough the interposed liquid to the flexible diaphragm, and the latteralternately expanded and contrated with in the interposed chamber orchambers, to first fill said chamber or chambers with the water beingpumped, and subsequently to discharge the same therefrom.

In the accompanying drawing, the invention is shown applied to ahorizontal doubleacting piston-pump, such answering as well as any otherpump to illustrate the novelty and utility of my invention.

Figure'l is a longitudinal vertical section of such a pump, with theinvention applied,

and Fig. 2 avertical transverse section thereof on the irregular line a.10.

A is the pump-cylinder, and B its piston with attached rod b.

(J is the inlet pipe or passage of the pump, formed with suitablebranches or openings, including apertures c 0, which are controlled bythe inlet-valves D D.

E is the outlet or discharge passage of the pump, having apertures d d,which are controlled by the outlet or delivery valves 'G G.

Arranged between the pumpcylinder A and the inlet and outlet valves DG,are chambers H H,in free communication, respectively, by aperturese 0,with opposite ends of the pumpcylinder. Each of these chambers should beof the same cubical capacity, or thereabout, as the pump-cylinder, lessthe space occupied by the piston and its rod therein. Said chambers maybe of any suitable shape, and are fitted with a flexible diaphragm, I,applied in a close manner to their upper ends, beneath the inlet andoutlet valves of the pump.

Such flexible diaphragm may be either square, round, or of any otherdesired form, and may be made of india-rubber or any other suitableflexible material.

In the operation of the pump, supposing its piston B to be moving indirection of the arrow 3 the oil, clean water, or liquid with which thepump-cylinder A and either one of the chambers H has been charged isdrawn from the left-hand chamber H through its aperture e to the back ofthe piston B by the motion of the latter, and the liquid in front of thepiston discharged through the right-hand aperture e to the right-handchamber H. This action causes the left-hand flexible diaphragm ,I to .bedrawn down into the left-hand chamber H, as the diaphragm of the otherchamber H had been previously drawn down into the latter, and therebyopens the left-hand inlet-valve D to admit the water being pumped to thetop of the left-hand diaphragm I, while, or at the same time, the liquidin front of the piston B is forced up through theright-hand aperture 0,and the depressed diaphragm I of v the right-hand chamber H isaccordingly raised, and made to expel the water, previously pumped ordrawn into said chamber through its inlet-valve D, out through thei'i'ghthanil delivery-valve G. This action is repeated alternately foreach chamber H, the flexible (liaphragms and inlet and outlet valves ofthe same successively operating to keep up a continuous pumping, and theWater which is pumped up and discharged always being prevented by theflexible diaphragms from entering the pumping-cylinder A.

In the case of a single piston, or of a-plu'nger-p'ump, but one of thechambers H with its flexible diaphragm, inlet -valve, and outletvalves,is necessary, and theworkingliquid interposed between said diaphragm andthe I pump-cylinder or its piston need only be sufficient to fill thepump-cylinder space unoccupied by the piston and its rod, or to fill thesingle chamber H of like capacity.

Of course difl'ereut styles or constructions of pumps require difl'erentconstructions or ar- HENRY A. JAMLESON.

Witnesses HENRY F. BROWN, FRED. HAYNES.

